5-18
Applications
Date Code 20010215
SEL-321-5 Instruction Manual
Other Relay Elements and Settings Affected
5HOD\HOHPHQWV7$7%7&DQG37
Switch-Onto-Fault Logic Setting
7KH+HOHPHQWLVLQWHQGHGIRUXVHDVDKLJKVHWQRQGLUHFWLRQDOSKDVHRYHUFXUUHQWGHWHFWRULQ
WKH6ZLWFK2QWR)DXOWORJLF,IDOLQHEUHDNHULVFORVHGLQWRDFORVHLQWKUHHSKDVHEROWHGIDXOW
ZKHUHOLQHVLGHSRWHQWLDOWUDQVIRUPHUVDUHXVHGSRODUL]LQJYROWDJHIRUWKHWKUHHSKDVHGLVWDQFH
HOHPHQWVLVQHYHUHVWDEOLVKHG,QWKLVVLWXDWLRQWKHGLVWDQFHHOHPHQWVGRQRWRSHUDWH,QWKLV
LQVWHOHPHQWLVSURYLGHGWRKHOSSUHYHQWDIDLOXUHWRWULSWKHOLQHEUHDNHU
7KH+HOHPHQWPHDVXUHVFXUUHQWPDJQLWXGHLQHDFKSKDVHZLWKQRGHSHQGHQFHRQSRODUL]LQJ
YROWDJHV7KLVHOHPHQWLVQRQGLUHFWLRQDODQGVKRXOGEHXVHGRQO\LQWKHVZLWFKRQWRIDXOWORJLF
PDVN072ZKHQWKHOLQHEUHDNHULVFORVHGWRWHVWWKHOLQHRQDUDGLDOEDVLV,IIDXOWGXW\LQ
IURQWRIWKHOLQHWHUPLQDOLVPXFKJUHDWHUWKDQEHKLHOHPHQWFDQDOVREHXVHGLQWKH
XQFRQGLWLRQDOWULSORJLFPDVN078WRSURYLGHUDSLGFOHDUDQFHRIFORVHLQIDXOWV
7\SLFDO+VHWWLQJVDUHRIWKUHHSKDVHIDXOWGXW\DWWKHORFDOEXV
7KHWKUHHSKDVHIDXOWGXW\IRUDIDXOWDW%XV%LV$7RDVVXUHUDSLGFOHDUDQFHRIWKLVIDXOW
D+VHWWLQJRI$LVVHOHFWHGIRUWKLVH[DPSOH
&DOFXODWLRQV &75
VHFRQGDU\
$
SULPDU\
$
DPSV
VHFRQGDU\
+
7KH6ZLWFK2QWR)DXOWORJLFPD\EHHQDEOHGE\FKDQJHLQWKH$VWDWXVVKRZLQJWKHEUHDNHU
KDVMXVWFORVHGRUE\DVVHUWLQJWKHFORVHLQSXWWRWKHUHOD\IURPWKHEUHDNHUFORVHEXV
7KH$PHWKRGZRUNVZHOOIRUVLQJOHRUPXOWLSOHEUHDNHUDSSOLFDWLRQV
)RUDVLQJOHEUHDNHUFRQILJXUDWLRQXVLQJWKHFORVHEXVHQDEOHLVDEHWWHUVHOHFWLRQ7KHFORVH
HQDEOHGHOD\&/2(1'VKRXOGEHVHWOHVVWKDQWKHVKRUWHVWUHFORVHRSHQLQWHUYDO7KH6ZLWFK
2QWR)DXOW'HOD\627)'GHWHUPLQHVKRZORQJWKH627)ORJLFLVDOORZHGWRWULSDIWHUWKH
EUHDNHULVFORVHG
)RURXUH[DPSOHWKHFORVHPHWKRGLVXVHG
(627) <
(1&/2 <
&/2(1'
(1$ 1
627)'
+
Relay Elements and Other Settings Affected
5HOD\
Summary of Contents for SEL-321-5
Page 6: ......
Page 8: ......
Page 16: ......
Page 70: ...2 50 Specifications Date Code 20010215 SEL 321 5 Instruction Manual LJXUH RJLF 6 PERO HJHQG ...
Page 88: ...2 68 Specifications Date Code 20010215 SEL 321 5 Instruction Manual LJXUH 9ROWDJH OHPHQW RJLF ...
Page 106: ......
Page 152: ......
Page 158: ......
Page 252: ......
Page 253: ...SEL DIRECTION AND POLARITY CHECK FORM ...
Page 254: ......
Page 255: ...SEL DIRECTION AND POLARITY CHECK FORM ...
Page 256: ......
Page 260: ......
Page 318: ......
Page 322: ......
Page 326: ......
Page 328: ......
Page 330: ......
Page 334: ......
Page 336: ......
Page 338: ......
Page 344: ......